Glass-molding apparatus.



J. J. WANKO.

GLASS MOLDING APPARATUS.

APPLICATION FILED mum, 191 0.

99%,806 Patented June 13, 1911.

2 SHEETS-SHEET 1.

J. J. WANKO.

GLASS MOLDING APPARATUS.

APPLICATION FILED rum, 1910.

994,806, Patented June 13, 1911.

2 SHEETS-SHEET 2.

3 u u c: riot 6 chi/AI f/a/Ma w flmmm JOHN J. WANKO, OF WESTPORT, MARYLAND.

GLASS-MOLDING APPARATUS.

season.

Specification of Letters Eatent.

Patented June 13, 1911.

Application filed February 4, 1910. Serial No. 542,130.

To all whom it may concern:

Be it known that I, JOHN J WANKO, a citizen of the United States, residing at Westport in the county of Baltimore and State of Maryland, have invented new and useful Improvements in Glass-Molding Apparatus, of which the following is a specification.

. This invention relates to apparatus for molding bottles and other articles of glassware, and particularly to glass molding ap paratus of that type in which a blank of the article is first formed in a blank mold and then transferred to a blow mold in which the operation is completed by the blowing process.

In order to facilitate the flow of the charge of molten glass from the gathering rod to the blank mold, it is customary to swab the mold after each operation with oil or other lubricant. If this is not done and the mold is left dry, the glass will not roll freely and properly'into the mold and the resultant article will be imperfect in form, the body wall of the article generally varying at different points in thickness. 0n the other hand, if too much oil is used, the glass is liable to be discolored thereby, or by the smoke or particles of products of combustion from the burning of the oil in the hot mold. To avoid these objections it is necessary to oil the mold with care and to clean the same at intervals, but, as these operations interfere with the output of the operator, they are as a general rule but imperfectly carried out, the operator preferring to run the risk of making a certain percentage of defective articles.

The object of the present invention is to provide a means by which a:v blast or current of air may be directed into the blank mold, whereby the same will be freed from exc'essoil, smoke or other foreign substances, thus insuring the production of perfectly formed articles free from defects on each operation.

The invention consists of the features of construction, combination and arrangement of parts hereinafter fully described and claimed, reference being had to the accompanying drawings, in which Figure 1 is a front elevation, partially in section, showing adjacent blank molds and forming plungers of a molding apparatus of the character described and the means for clearing the molds. Fig. 2 is an end elevation, showin in addition a modified means for supplying a blast of air to each mold. Figs. 3 and 4 are sectional views showing diflerent forms of nozzles which may be employed. Fig. 5 is a cross section on the line 55 of Fig. 3.

Referring to the drawings, the numeral 1 designates two adjacent spaced blank molds of a battery. of molds commonly employed in an apparatus ofthis character, in which a molder or operator and a batch boy or assistant are in charge of a designated number of molds. In this type of apparatus, the molds are successively supplied with glass and the blanks formed by the action of cooperating plungers, after which the blank is transferred from the blank mold to a blow mold, in which the operation is completed by the usual blowing action.

Arranged in suitable relation to the molds is the usual air supply pipe 2 from which lead branches 3 on lines between the molds, three of such branches being shown in the present instance, the central branch carrying v a T-coupling 4 and the end branches or terminal branches L-couplings 5. As shown, each mold 1 has an upper forming cavity 6 and a flanged head 7 to receive a detachable cap 8 having an opening in communication with the cavity 6 for the passage of the forming stem 9 of the plunger 10, the body of the bottle or article being formed in the cavity 6, while the neck thereof is formed in the opening of the cap 8. After the formation of the pattern and retraction of the plunger, the pattern and cap are transferred to the blow mold, in which the operation is completed by blowing, as heretofore described. Each mold has a bottom opening 11 communicating through a duct or passage 12 with the lower end of the channel 6, which duct is controlled by an upwardly opening check valve 13, adapted to permit air to enter the cavity to prevent the formation of a vacuum in the withdrawal of the blank, and thereby permit the latter to be easily removed. It is customary in molding apparatus of this character, to provide the conductors 3 with nozzles arranged to discharge a blast of air against the plunger to keep the same at a sufliciently low temperature. Preferably sn 1 blasts of air to kee the molds 1 Se r dii l foreign substances liable to discolor the glass.

In the embodiment shown in Fig. 1, curved or goose-necked nozzles 14 are fitted in the ends of the T-coupling 4, preferably by a screw-threaded connection, and each of 'said nozzles is formed with a pair of ducts or passages 15 and 16. The ducts or passages 15 of the two nozzles are straight and extend clear through the horizontal arms of the nozzles to direct jets of air upon the plungers 10, as will be readily understood.

The ducts 16, on the other hand, extend through both arms of the nozzles and open through the lower ends of the latter for directing currents of air downward at an angle upon the upper surfaces of the molds 1 and into their cavities 6. Preferably each nozzle is threaded at its lower end to receive a cap 17 having an outlet opening 18 therein for the discharge of the blast, but the use of this cap is not essential. Similar nozzles are connected with the elbows 5 of the outer branches 3, the nozzle of each outer branch being arranged for cooperation of the adjacent nozzle of the central branch or is removed, the blast entering the forming cavity blows out any smoke or carbon which may be present, the operator then swabs the mold with the usual amount of oil, and upon the removal of the swab the blast is again directed into the cavity with the result that any free oil contained therein will be discharged. Hence, the mold will be kept clean and free from the presence of substances liable to prevent the easy and rapid feed of the glass into the mold or to discolor the same during the process of forming the glass by the action of the plunger, and as this operation will be secured without care or attention on the part of the operator the advantage thereof will be apparent.

In Fig. 2 of the drawing, I have shown the addition to the structure described of a modified mode of supplying the air blast to each blank mold, which modification consists in extending from the pipe 2 a branch or conductor 19 to a point beneath the mold and a providing said branch with a discharge valve or nozzle 20 arranged to inject a jet of air into the bottom chamber 20, so that when the cavity, 6 is open the valve 13 will be forced vopen under pressure allowing the blast to pass upward through the cavity 6 and clear upon a rotating carrier 'or table with advantageous results.

Each nozzle 14 preferably has the horizontal portion of its passage 16 extending through the nozzle from end to end parallel with the passage 15, the outer end of said passage 16 being, however, closed by a plug 16. This plug may be removed, in the event that the passage should become clogged for the introduction of a suitable clearlng tool.

In Fig. 3, I have shown a modified form of goose-neck nozzle in which the passages 15 and 16 extend through tapered nipples 15 and 16, which construction may be employed in some instances.

In Fig. 4, I have shown a further modified form of nozzle fitted in each' end of the branch 4, each of said nozzles comprising a screw plug 14* in which the passages '15 and 16 are formed. In this construction the outer end of the assage 16 which extends straight through the nozzle is closed by a plug 16, and an angular outlet 16 for the discharge of the blast is provided.

' Having described the invention,Iclaim:-

1. In a glass blowing apparatus, the combination with a blank mold, and a vertically movable forming plunger, of an air supply pipe arranged above the level of the mold, branches carried by said pipe and arranged on opposite sides of the plunger, and nozzles upon said branches provided with horizontal ducts for discharging currents of air against the plunger and obliquely arranged ducts for discharging blasts of air downwardly into the forming cavity of the mold.

2. In a glass blowing apparatus, the combination with a blank mold, and a vertically movable forming plunger, of an air supply pipe arranged above the level of the mold, and a discharge nozzle carried by said pipe and provided with ducts for respectively discharging blasts of air at different angles therefrom and respectively against the surface of the plunger and downwardly into the forming cavity of the mold.

3. In a glass blowing apparatus, the combination with a blank mold, and a vertically movable forming plunger, of an air supply pipe arranged above the level of the.mold, and an air blast nozzle upon said pipe pro vided with a horizontal duct for discharging a current of air against the plunger and a downwardly proj ecting obliquely arranged duct for discharging a blast of air downwardly into the forming cavity of the mold.

4. In a glass blowing apparatus, the combination with a blank mold, and a vertically movable forming plunger, of an air supply pipe arranged above the level of the mold, branches carried by said pipe on opposite sides of the plane of movement of the plunger, and nozzles carried by said branches and each provided with ducts for respectively discharging blasts of air inwardly against the plunger and downwardly at an angle into the forming cavity of the mold.

5. In a glass blowing apparatus, the combination with a blank mold, and a vertically movable forming plunger, of an air supply pipe arranged above the level of the mold, and a nozzle carried by said pipe and disposed above the mold and at one side of the plane of movement of the plunger, said nozzle being provided with a duct for discharging a blast of air laterally against the plunger and a duct for discharging a blast of air downwardly into the mold.

6. In a glass blowing apparatus, the com bination with a blank mold, and a vertically movable forming plunger, of an air supply pipe arranged above the level of the mold, a coupling carried by said pipe, and a nozzle detachably fitted within said coupling and having a horizontal portion and an angularly bent portion, said horizontal portlon being provided with a duct for discharging a blast of air laterally against the forming plunger and said angularly bent portion being provided with a duct for discharging a blast of air downwardly at an angle into the mold.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN J WANKO.

Witnesses: I

SAM. D. BUCK, RAYMOND U. GLANN. 

